- Knack Weight Training for Women: Step-by-Step Exercises for Weight Loss, Leah Garcia. pp. 57. quote:"Plank variations are abundant, and small changes increase the intensity of the exercise."
- Weight Training for Dummies, Liz Neporent, Suzanne Schlosberg, Shirley J. Archer. pp.263.
- Core Strength For Dummies, LaReine Chabut. Quote:"It's used in all yoga sun salutations and other poses. It is also a Pilates-based exercise used in many of Joseph Pilates exercises..."
- Pocket Guide to Fitness Louiza Patsis. pp.176. quote:"The "plank exercise" is used in Pilates classes."
- Kettlebells for Dummies, Sarah Lurie. pp.260. quote:"If you've done other exercises like yoga or Pilates before, you may be familiar with the plank position already."
- The Ultimate Fitness Boxing & Kickboxing Workout, Ross O'Donnell, Trafford Publishing, 2005, ISBN 978-1-4120-6451-4
- Hauser, Christine. He Held a Plank for More Than 8 Hours, Setting a Record. New York Times. 2020-02-27.